CN117375655B - 5GHz WIFI radio frequency signal processing circuit - Google Patents
5GHz WIFI radio frequency signal processing circuit Download PDFInfo
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- CN117375655B CN117375655B CN202311672397.4A CN202311672397A CN117375655B CN 117375655 B CN117375655 B CN 117375655B CN 202311672397 A CN202311672397 A CN 202311672397A CN 117375655 B CN117375655 B CN 117375655B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/189—High frequency amplifiers, e.g. radio frequency amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/451—Indexing scheme relating to amplifiers the amplifier being a radio frequency amplifier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention relates to the technical field of radio frequency, and discloses a 5GHz WIFI radio frequency signal processing circuit which is used for amplifying power of a 5GHz WIFI radio frequency transmitting signal and a 5GHz WIFI radio frequency receiving signal. Comprising the following steps: the system comprises a first signal processing module, a first radio frequency front end module, a second signal processing module and a third signal processing module; the first signal processing module is connected with the first radio frequency front end module, the first radio frequency front end module is connected with the second signal processing module, the third signal processing module and the second radio frequency front end module, the first signal processing module is connected with the second radio frequency front end module, and the second radio frequency front end module is connected with the second signal processing module, the third signal processing module and the first radio frequency front end module.
Description
Technical Field
The invention relates to the technical field of radio frequency, in particular to a 5GHz WIFI radio frequency signal processing circuit.
Background
In the prior art, a single SKY85743 is used for designing, so that power amplification of 5GHz WIFI radio frequency transmitting signals and receiving signals is realized. Among these, SKY85743 is a highly integrated 5GHz radio frequency Front End Module (FEM) comprising a 5GHz Single Pole Double Throw (SPDT) transmit/receive (T/R) switch, a 5GHz high gain Low Noise Amplifier (LNA) and a 5GHz Power Amplifier (PA). The LNA and PA disable functions may ensure a low leakage current off mode. The integrated logarithmic power detector is included to provide a closed loop power control dynamic range in excess of 27 dB.
The prior art circuit has the following disadvantages: the 5GHz WIFI signal is relatively high in working frequency band, so that in actual use, when the signal passes through a space, a wall or other obstacles, the signal attenuation is relatively large, and when the signal reaches a receiving end, the signal is usually relatively weak, and the coverage range and the data transmission speed are reduced.
Disclosure of Invention
The invention provides a 5GHz WIFI radio frequency signal processing circuit which is used for amplifying power of a 5GHz WIFI radio frequency transmitting signal and a 5GHz WIFI radio frequency receiving signal.
The first aspect of the present invention provides a 5GHz WIFI radio frequency signal processing circuit, the 5GHz WIFI radio frequency signal processing circuit comprising:
the system comprises a first signal processing module, a first radio frequency front end module, a second signal processing module and a third signal processing module; the first signal processing module is connected with the first radio frequency front end module, the first radio frequency front end module is connected with the second signal processing module, the first signal processing module is connected with the second radio frequency front end module, the second radio frequency front end module is connected with the second signal processing module, the third signal processing module is connected with the first radio frequency front end module and the second radio frequency front end module, and the second radio frequency front end module is connected with the first radio frequency front end module;
The first radio frequency front end module comprises a first power amplifier, a first low noise amplifier, a first transmitting/receiving state change-over switch and a first LNA enabled state change-over switch; the first transmit/receive state switch is used for connecting the first power amplifier and a receiving circuit, and the first LNA enabled state switch is used for connecting the first low noise amplifier;
The second radio frequency front end module comprises a second power amplifier, a second low noise amplifier, a second transmitting/receiving state change-over switch and a second LNA enabled state change-over switch; the second transmit/receive state switch is for connecting the second power amplifier and the receive circuit, and the second LNA enable state switch is for connecting the second low noise amplifier.
With reference to the first aspect, in a first implementation manner of the first aspect of the present invention, the 5GHz WIFI radio frequency signal processing circuit is configured to:
When the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in a transmitting mode, a first target radio frequency signal is received through the first signal processing module;
performing signal halving processing on the first target radio frequency signal through the first signal processing module to obtain a first transmitting radio frequency signal and a second transmitting radio frequency signal;
transmitting the first transmission radio frequency signal to the first radio frequency front end module through the first signal processing module, and transmitting the second transmission radio frequency signal to the second radio frequency front end module;
The first power amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front-end module, radio frequency signal power amplification is carried out on the first transmitting radio frequency signal through the first power amplifier, a first amplified radio frequency signal is obtained, and the first amplified radio frequency signal is transmitted to the second signal processing module;
The second power amplifier is conducted through a second transmitting/receiving state change-over switch in the second radio frequency front-end module, radio frequency signal power amplification is carried out on the second transmitting radio frequency signal through the second power amplifier, a second amplified radio frequency signal is obtained, and the second amplified radio frequency signal is transmitted to the second signal processing module;
And carrying out signal synthesis on the first amplified radio frequency signal and the second amplified radio frequency signal through the second signal processing module to obtain a second target radio frequency signal.
With reference to the first aspect, in a second implementation manner of the first aspect of the present invention, the 5GHz WIFI radio frequency signal processing circuit further includes: and a third signal processing module.
With reference to the first aspect, in a third implementation manner of the first aspect of the present invention, the 5GHz WIFI radio frequency signal processing circuit is configured to:
When the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in a receiving mode, a third target radio frequency signal is received through a preset antenna, and the second signal processing module is used for carrying out signal equal division processing on the third target radio frequency signal to obtain a first receiving radio frequency signal and a second receiving radio frequency signal;
Transmitting the first received radio frequency signal to the first radio frequency front end module through the second signal processing module, and transmitting the second received radio frequency signal to the second radio frequency front end module;
Transmitting the first received radio frequency signal to the third signal processing module through the first radio frequency front end module, and transmitting the second received radio frequency signal to the third signal processing module through the second radio frequency front end module;
The third signal processing module is used for carrying out signal synthesis on the first received radio frequency signal and the second received radio frequency signal to obtain a fourth target radio frequency signal, and the third signal processing module is used for transmitting the fourth target radio frequency signal to the first radio frequency front-end module;
The first low noise amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front end module, the first low noise amplifier is used for carrying out first amplification or Bypass processing on the fourth target radio frequency signal to obtain a first processed radio frequency signal, and the first processed radio frequency signal is transmitted to the second radio frequency front end module through the first radio frequency front end module;
And switching on the second low noise amplifier through a second transmitting/receiving state switching switch in the second radio frequency front end module, performing second amplification or Bypass processing on the first processed radio frequency signal through the second low noise amplifier to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
With reference to the first aspect, in a fourth implementation manner of the first aspect of the present invention, the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is greater than or equal to a first preset signal intensity threshold value, bypassing the first low noise amplifier through a first LNA enabling state change-over switch in the first radio frequency front-end module, performing Bypass processing on the fourth target radio frequency signal to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front-end module through the first radio frequency front-end module;
bypassing the second low noise amplifier through a second LNA enabling state change-over switch in the second radio frequency front end module, performing Bypass processing on the first processed radio frequency signal to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
With reference to the first aspect, in a fifth implementation manner of the first aspect of the present invention, the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is smaller than a first preset signal intensity threshold and larger than a second preset signal intensity threshold, enabling the first low noise amplifier through a first LNA enabling state change-over switch in the first radio frequency front end module, amplifying the fourth target radio frequency signal for the first time through the first low noise amplifier to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front end module through the first radio frequency front end module;
bypassing the second low noise amplifier through a second LNA enabling state change-over switch in the second radio frequency front end module, performing Bypass processing on the first processed radio frequency signal to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
With reference to the first aspect, in a sixth implementation manner of the first aspect of the present invention, the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is smaller than or equal to a second preset signal intensity threshold value, enabling the first low noise amplifier through a first LNA enabling state change-over switch in the first radio frequency front-end module, amplifying the fourth target radio frequency signal for the first time through the first low noise amplifier to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front-end module through the first radio frequency front-end module;
Enabling the second low noise amplifier through a second LNA enabling state change-over switch in the second radio frequency front end module, performing second amplification on the first processed radio frequency signal through the second low noise amplifier to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
In the technical scheme provided by the invention, the 5GHz WIFI radio frequency signal processing circuit comprises: the system comprises a first signal processing module, a first radio frequency front end module, a second signal processing module and a third signal processing module; the first signal processing module is connected with the first radio frequency front end module, the first radio frequency front end module is connected with the second signal processing module, the first signal processing module is connected with the second radio frequency front end module, the second radio frequency front end module is connected with the second signal processing module, the third signal processing module is connected with the first radio frequency front end module and the second radio frequency front end module, and the second radio frequency front end module is connected with the first front end module; the first radio frequency front end module comprises a first power amplifier, a first low noise amplifier, a first transmitting/receiving state change-over switch and a first LNA enabling state change-over switch; the second radio frequency front end module comprises a second power amplifier, a second low noise amplifier, a second transmitting/receiving state change-over switch and a second LNA enabling state change-over switch; when the circuit works in a receiving mode, the low noise amplifiers in the two radio frequency front end modules are connected in series to amplify signals twice, and the receiving sensitivity is improved by 3dB. In use, the invention doubles the transmission distance in open and unobstructed space by improving the performance by 3dB.
Drawings
FIG. 1 is a schematic diagram of an embodiment of a 5GHz WIFI RF signal processing circuit according to the present invention;
fig. 2 is a schematic diagram of a first signal processing module according to an embodiment of the invention;
fig. 3 is a schematic diagram of an impedance matching module of a first rf according to an embodiment of the invention;
fig. 4 is a schematic diagram of an impedance matching module of a second rf according to an embodiment of the invention;
FIG. 5 is a schematic diagram of a second signal processing module according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a third signal processing module according to an embodiment of the invention;
fig. 7 is a schematic diagram of an impedance matching module of a third rf in an embodiment of the invention;
FIG. 8 is a schematic diagram of an impedance matching module of a fourth RF in an embodiment of the invention;
fig. 9 is a schematic diagram of an impedance matching module of a fifth rf according to an embodiment of the invention;
Fig. 10 is a schematic diagram of an impedance matching module of a sixth rf in an embodiment of the invention;
FIG. 11 is a schematic diagram of an impedance matching module of a seventh RF in an embodiment of the invention;
fig. 12 is a schematic diagram of an impedance matching module of an eighth rf in an embodiment of the invention;
Fig. 13 is a schematic diagram illustrating a pin distribution of the first rf front-end module 102 according to an embodiment of the invention;
Fig. 14 is a schematic diagram of pin distribution of the second rf front-end module 103 according to an embodiment of the invention.
Detailed Description
The embodiment of the invention provides a 5GHz WIFI radio frequency signal processing circuit which is used for amplifying power of a 5GHz WIFI radio frequency transmitting signal and a 5GHz WIFI radio frequency receiving signal. The terms "first," "second," "third," "fourth" and the like in the description and in the claims and in the above drawings, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments described herein may be implemented in other sequences than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed or inherent to such process, method, article, or apparatus.
For ease of understanding, a specific flow of an embodiment of the present invention is described below, referring to fig. 1, and an embodiment of a 5GHz WIFI radio frequency signal processing circuit in an embodiment of the present invention includes:
a first signal processing module 101, a first rf front-end module 102, a second rf front-end module 103, a second signal processing module 104, a third signal processing module 105; the first signal processing module 101 is connected with the first radio frequency front end module 102, the first radio frequency front end module 102 is connected with the second signal processing module 104, the first signal processing module 101 is connected with the second radio frequency front end module 103, the second radio frequency front end module 103 is connected with the second signal processing module 104, the third signal processing module 105 is connected with the first radio frequency front end module 102 and the second radio frequency front end module 103, and the first radio frequency front end module 102 is connected with the second radio frequency front end module 103; the following description is needed: the solid arrows in fig. 1 represent the trend of the radio frequency transmission signal, namely: TX 1-TX 2; the dashed arrow in fig. 1 indicates the trend of the radio frequency received signal, namely: RX 1 > RX 2 > RX 3 > RX 4 > RX 5.
The first rf front-end module 102 includes a first power amplifier, a first low noise amplifier, a first transmit/receive state switch, and a first LNA enable state switch; the first LNA enable state switch is used for connecting the first low noise amplifier;
The second rf front-end module 103 includes a second power amplifier, a second low noise amplifier, a second transmit/receive state switch, and a second LNA enable state switch; the second transmit/receive state switch is for connecting the second power amplifier and the receive circuit, and the second LNA enable state switch is for connecting the second low noise amplifier.
In one embodiment, the 5GHz WIFI radio frequency signal processing circuit is configured to:
When the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in a transmitting mode, a first target radio frequency signal is received through the first signal processing module 101;
Performing signal dividing processing on the first target radio frequency signal through a first signal processing module 101 to obtain a first transmitting radio frequency signal and a second transmitting radio frequency signal;
transmitting the first transmission radio frequency signal to the first radio frequency front end module 102 and the second transmission radio frequency signal to the second radio frequency front end module 103 through the first signal processing module 101;
The first power amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front-end module 102, radio frequency signal power amplification is carried out on the first transmitting radio frequency signal through the first power amplifier, a first amplified radio frequency signal is obtained, and the first amplified radio frequency signal is transmitted to the second signal processing module 104;
the second power amplifier is conducted through a second transmitting/receiving state change-over switch in the second radio frequency front-end module 103, radio frequency signal power amplification is carried out on the second transmitting radio frequency signal through the second power amplifier, a second amplified radio frequency signal is obtained, and the second amplified radio frequency signal is transmitted to the second signal processing module 104;
the second signal processing module 104 performs signal synthesis on the first amplified radio frequency signal and the second amplified radio frequency signal to obtain a second target radio frequency signal.
Specifically, the emission mode theory of operation: when the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in the transmitting mode, the first target radio frequency signal enters the 5GHz WIFI radio frequency signal processing circuit from the position of the first signal processing module 101, where, as shown in fig. 2, the first signal processing module 101 includes an inductance L885, a capacitance C886, a capacitance C912, an inductance L908, a capacitance C909, and a resistance R315, and after the first target radio frequency signal passes through the inductance L885, the capacitance C886, the capacitance C912, the inductance L908, the capacitance C909, and the resistance R315 in the first signal processing module 101, the radio frequency signal is equally divided into two parts with equal phase, amplitude, and power, so as to obtain the first transmitting radio frequency signal and the second transmitting radio frequency signal.
The first transmitting rf signal enters the pin 2 of the first rf front-end module 102 after passing through the impedance matching module of the first rf, where the impedance matching module of the first rf is shown in fig. 3, the impedance matching module of the first rf includes a capacitor C406 and a capacitor C186, the first power amplifier is turned on by the first transmitting/receiving state switch in the first rf front-end module 102, the first transmitting rf signal is amplified by the first power amplifier to obtain a first amplified rf signal, and the first amplified rf signal is transmitted to the second signal processing module 104.
The second transmitting rf signal enters the pin 2 of the second rf front-end module 103 through the second rf impedance matching module, where the second rf impedance matching module is shown in fig. 4, and the second rf impedance matching module includes a capacitor C907 and a capacitor C322, and conducts the second power amplifier through the second transmitting/receiving state switch in the second rf front-end module 103, and performs rf signal power amplification on the second transmitting rf signal through the second power amplifier to obtain a second amplified rf signal, and transmits the second amplified rf signal to the second signal processing module 104.
Further, the first amplified rf signal and the second amplified rf signal after being amplified by the power of the first rf front-end module 102 and the second rf front-end module 103 respectively output the first amplified rf signal and the second amplified rf signal from the pin 12 of the first rf front-end module 102 and the pin 12 of the second rf front-end module 103 respectively, and after the first amplified rf signal and the second amplified rf signal pass through the second signal processing module 104, the first amplified rf signal and the second amplified rf signal are recombined to form a path, so as to obtain a second target rf signal, wherein the second signal processing module is shown in fig. 5, and the second signal processing module includes a resistor R327, a capacitor C918, an inductor L919, a capacitor C920, an inductor L921, and a capacitor C922. Because the transmitting parts of the first rf front-end module 102 and the second rf front-end module 103 are symmetrical in circuit design from the position of the connector J9, and the wiring lengths are consistent, the rf signals coming out from the pin 12 of the first rf front-end module 102 and the pin 12 of the second rf front-end module 103 have the same phase, the same amplitude and the same power, and after the first amplified rf signal and the second amplified rf signal are recombined into one path through the second signal processing module 104, the power of the rf signal is doubled after the rf signal is superimposed, that is, the power of the rf signal has a gain effect of 3 dB.
In a specific embodiment, the 5GHz WIFI radio frequency signal processing circuit further includes: and a third signal processing module.
Specifically, as shown in fig. 6, the third signal processing module includes a resistor R328, a capacitor C924, an inductor L923, a capacitor C926, an inductor L925, and a capacitor C927.
In one embodiment, the 5GHz WIFI radio frequency signal processing circuit is configured to:
when the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in a receiving mode, a third target radio frequency signal is received through a preset antenna, and signal equally dividing processing is performed on the third target radio frequency signal through the second signal processing module 104, so that a first receiving radio frequency signal and a second receiving radio frequency signal are obtained;
transmitting the first received rf signal to the first rf front-end module 102 and the second received rf signal to the second rf front-end module 103 through the second signal processing module 104;
Transmitting the first received radio frequency signal to the third signal processing module through the first radio frequency front end module 102, and transmitting the second received radio frequency signal to the third signal processing module through the second radio frequency front end module 103;
The third signal processing module is used for carrying out signal synthesis on the first received radio frequency signal and the second received radio frequency signal to obtain a fourth target radio frequency signal, and the third signal processing module is used for transmitting the fourth target radio frequency signal to the first radio frequency front-end module 102;
The first low noise amplifier is turned on through a first transmitting/receiving state change-over switch in the first radio frequency front end module 102, the first amplification or Bypass processing is carried out on the fourth target radio frequency signal through the first low noise amplifier, a first processed radio frequency signal is obtained, and the first processed radio frequency signal is transmitted to the second radio frequency front end module 103 through the first radio frequency front end module 102;
The second low noise amplifier is turned on by the second transmitting/receiving state switch in the second rf front-end module 103, the second amplification or Bypass processing is performed on the first processed rf signal by the second low noise amplifier, so as to obtain a second processed rf signal, and the second processed rf signal is transmitted to the preset rf transceiver by the second rf front-end module 103.
Specifically, the receiving mode operation principle: when the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in the receiving mode, the third target radio frequency signal is received through a preset antenna and passes through the connector J9, after passing through the second signal processing module 104, the third target radio frequency signal is equally divided into two parts of equal phase, amplitude and power, so as to obtain a first receiving radio frequency signal and a second receiving radio frequency signal, the first receiving radio frequency signal passes through the third radio frequency impedance matching module and then enters the pin 12 of the first radio frequency front end module 102, wherein the third radio frequency impedance matching module is shown in fig. 7, and the third radio frequency impedance matching module comprises a capacitor C363, a capacitor C459 and a capacitor C400. The second received rf signal also enters the pin 12 of the second rf front-end module 103 after passing through the fourth rf impedance matching module, as shown in fig. 8, where the fourth rf impedance matching module includes a capacitor C897, a capacitor C889, and a capacitor C899. And then the first received radio frequency signal and the second received radio frequency signal are respectively output from the pin 14 of the first radio frequency front end module 102 and the pin 14 of the second radio frequency front end module 103, and after passing through the third signal processing module, the signals are recombined into one path to obtain a fourth target radio frequency signal. The fourth target rf signal enters the pin 16 of the first rf front-end module 102 after passing through the fifth rf impedance matching module, as shown in fig. 9, where the fifth rf impedance matching module includes a capacitor C930, an inductor L42, a capacitor C928, and a resistor R929. The fourth target rf signal is amplified or Bypass-processed for the first time by the low noise amplifier inside the first rf front end module 102, and then is output from the pin 17 of the first rf front end module 102, and then reaches the seventh rf impedance matching module of the second rf front end module 103 after passing through the sixth rf impedance matching module to enter the pin 16 of the second rf front end module 103, where the sixth rf impedance matching module is shown in fig. 10, and the sixth rf impedance matching module includes an inductor L917, a capacitor C915, an inductor L41, and a capacitor C916; as shown in fig. 11, the seventh rf impedance matching module includes a capacitor C904, an inductor L39, a capacitor C902, and a resistor R903; the second amplification or Bypass processing is performed by the low noise amplifier inside the second rf front end module 103, and then the second amplified or Bypass processing is output from the pin 17 of the second rf front end module 103, and then the second amplified or Bypass processing passes through the eighth rf impedance matching module to reach the "5g_rx_chip_in" pin of the rf transceiver, where the eighth rf impedance matching module is shown in fig. 12, and the eighth rf impedance matching module includes an inductance L910, a capacitance C905, an inductance L40, and a capacitance C906.
In one embodiment, the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is greater than or equal to the first preset signal intensity threshold, bypassing the first low noise amplifier through the first LNA enabling state change-over switch in the first radio frequency front end module 102, performing Bypass processing on the fourth target radio frequency signal through the first low noise amplifier to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front end module 103 through the first radio frequency front end module 102;
the second low noise amplifier is bypassed by a second LNA enable state switch in the second rf front-end module 103, bypass processing is performed on the first processed rf signal by the second low noise amplifier to obtain a second processed rf signal, and the second processed rf signal is transmitted to a preset rf transceiver by the second rf front-end module 103.
Specifically, if the radio frequency signal strength of the third target radio frequency signal is greater than or equal to the first preset signal strength threshold, the fourth target radio frequency signal enters the pin 16 of the first radio frequency front end module 102 and the pin 16 of the second radio frequency front end module 103 and then is subjected to Bypass processing, and the radio frequency signal is not amplified.
In one embodiment, the 5GHz WIFI radio frequency signal processing circuit is configured to:
if the radio frequency signal intensity of the third target radio frequency signal is smaller than the first preset signal intensity threshold and larger than the second preset signal intensity threshold, enabling the first low noise amplifier through a first LNA enabling state change-over switch in the first radio frequency front end module 102, amplifying the fourth target radio frequency signal for the first time through the first low noise amplifier to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front end module 103 through the first radio frequency front end module 102;
the second low noise amplifier is bypassed by a second LNA enable state switch in the second rf front-end module 103, bypass processing is performed on the first processed rf signal by the second low noise amplifier to obtain a second processed rf signal, and the second processed rf signal is transmitted to a preset rf transceiver by the second rf front-end module 103.
Specifically, if the rf signal strength of the third target rf signal is smaller than the first preset signal strength threshold and larger than the second preset signal strength threshold, the pin 16 of the fourth target rf signal entering the first rf front-end module 102 will be LNA1 EN, the low noise amplifier amplifies the fourth target rf signal for the first time, and the pin 16 entering the second rf front-end module 103 performs Bypass processing, and does not amplify the second rf signal.
In one embodiment, the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is smaller than or equal to the second preset signal intensity threshold, enabling the first low noise amplifier through a first LNA enabling state change-over switch in the first radio frequency front end module 102, amplifying the fourth target radio frequency signal for the first time through the first low noise amplifier to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front end module 103 through the first radio frequency front end module 102;
Enabling a second low noise amplifier through a second LNA enabling state switch in the second radio frequency front end module 103, amplifying the first processed radio frequency signal for the second time through the second low noise amplifier to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module 103.
Specifically, if the rf signal strength of the third target rf signal is less than or equal to the second preset signal strength threshold, the pin 16 of the fourth target rf signal entering the first rf front-end module 102 will be LNA1 EN, and the low noise amplifier of the first rf front-end module 102 performs the first signal amplification on the fourth target rf signal to obtain the first processed rf signal. Referring to fig. 13, fig. 13 is a schematic diagram illustrating a pin distribution of the first rf front-end module 102 in an embodiment of the invention, where the pins of the first rf front-end module 102 include pin 2, pin 17, pin 14, and pin 16. When the first processed rf signal enters the pin 16 of the second rf front-end module 103, LNA2 EN is provided, and the low noise amplifier of the second rf front-end module 103 performs a second signal amplification process on the first processed rf signal to obtain a second processed rf signal. Referring to fig. 14, fig. 14 is a schematic diagram illustrating a pin distribution of a second rf front-end module 103 according to an embodiment of the present invention, where pins of the second rf front-end module 103 include pins 2, 17, 14, and 16. The LNAs are cascaded in the receive mode, and there is a 3dB boost in receive sensitivity when LNA1 EN of the first RF front end module 102 and LNA2 EN of the first RF front end module 102.
In the embodiment of the invention, the 5GHz WIFI radio frequency signal processing circuit comprises: the system comprises a first signal processing module, a first radio frequency front end module, a second signal processing module and a third signal processing module; the first signal processing module is connected with the first radio frequency front end module, the first radio frequency front end module is connected with the second signal processing module, the first signal processing module is connected with the second radio frequency front end module, the second radio frequency front end module is connected with the second signal processing module, the third signal processing module is connected with the first radio frequency front end module and the second radio frequency front end module, and the second radio frequency front end module is connected with the first radio frequency front end module; the first radio frequency front end module comprises a first power amplifier, a first low noise amplifier, a first transmitting/receiving state change-over switch and a first LNA enabling state change-over switch; the second radio frequency front end module comprises a second power amplifier, a second low noise amplifier, a second transmitting/receiving state change-over switch and a second LNA enabling state change-over switch; when the circuit works in a receiving mode, the low noise amplifiers in the two radio frequency front end modules are connected in series to amplify signals twice, and the receiving sensitivity is improved by 3dB. In use, the invention doubles the transmission distance in open and unobstructed space by improving the performance by 3dB.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a read-only memory (ROM), a random access memory (random access memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (5)
1. The utility model provides a 5GHz WIFI radio frequency signal processing circuit which characterized in that, 5GHz WIFI radio frequency signal processing circuit includes:
The system comprises a first signal processing module, a first radio frequency front end module, a second signal processing module and a third signal processing module; the first signal processing module is connected with the first radio frequency front end module, the first radio frequency front end module is connected with the second signal processing module, the first signal processing module is connected with the second radio frequency front end module, the second radio frequency front end module is connected with the second signal processing module, the third signal processing module is connected with the first radio frequency front end module and the second radio frequency front end module, and the first radio frequency front end module is connected with the second radio frequency front end module;
The first radio frequency front end module comprises a first power amplifier, a first low noise amplifier, a first transmitting/receiving state change-over switch and a first LNA enabled state change-over switch; the first transmit/receive state switch is used for connecting the first power amplifier and a receiving circuit, and the first LNA enabled state switch is used for connecting the first low noise amplifier;
The second radio frequency front end module comprises a second power amplifier, a second low noise amplifier, a second transmitting/receiving state change-over switch and a second LNA enabled state change-over switch; the second transmit/receive state switch is configured to connect the second power amplifier and the receive circuit, and the second LNA enable state switch is configured to connect the second low noise amplifier;
the 5GHz WIFI radio frequency signal processing circuit is used for:
When the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in a receiving mode, a third target radio frequency signal is received through a preset antenna, and the second signal processing module is used for carrying out signal equal division processing on the third target radio frequency signal to obtain a first receiving radio frequency signal and a second receiving radio frequency signal;
Transmitting the first received radio frequency signal to the first radio frequency front end module through the second signal processing module, and transmitting the second received radio frequency signal to the second radio frequency front end module;
Transmitting the first received radio frequency signal to the third signal processing module through the first radio frequency front end module, and transmitting the second received radio frequency signal to the third signal processing module through the second radio frequency front end module;
The third signal processing module is used for carrying out signal synthesis on the first received radio frequency signal and the second received radio frequency signal to obtain a fourth target radio frequency signal, and the third signal processing module is used for transmitting the fourth target radio frequency signal to the first radio frequency front-end module;
The first low noise amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front end module, the first low noise amplifier is used for carrying out first amplification or Bypass processing on the fourth target radio frequency signal to obtain a first processed radio frequency signal, and the first processed radio frequency signal is transmitted to the second radio frequency front end module through the first radio frequency front end module;
And switching on the second low noise amplifier through a second transmitting/receiving state switching switch in the second radio frequency front end module, performing second amplification or Bypass processing on the first processed radio frequency signal through the second low noise amplifier to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
2. The 5GHz WIFI radio frequency signal processing circuit of claim 1, wherein the 5GHz WIFI radio frequency signal processing circuit is configured to:
When the control signal controls the 5GHz WIFI radio frequency signal processing circuit to be in a transmitting mode, a first target radio frequency signal is received through the first signal processing module;
performing signal halving processing on the first target radio frequency signal through the first signal processing module to obtain a first transmitting radio frequency signal and a second transmitting radio frequency signal;
transmitting the first transmission radio frequency signal to the first radio frequency front end module through the first signal processing module, and transmitting the second transmission radio frequency signal to the second radio frequency front end module;
The first power amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front-end module, radio frequency signal power amplification is carried out on the first transmitting radio frequency signal through the first power amplifier, a first amplified radio frequency signal is obtained, and the first amplified radio frequency signal is transmitted to the second signal processing module;
The second power amplifier is conducted through a second transmitting/receiving state change-over switch in the second radio frequency front-end module, radio frequency signal power amplification is carried out on the second transmitting radio frequency signal through the second power amplifier, a second amplified radio frequency signal is obtained, and the second amplified radio frequency signal is transmitted to the second signal processing module;
And carrying out signal synthesis on the first amplified radio frequency signal and the second amplified radio frequency signal through the second signal processing module to obtain a second target radio frequency signal.
3. The 5GHz WIFI radio frequency signal processing circuit of claim 1, wherein the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is greater than or equal to a first preset signal intensity threshold value, bypassing the first low noise amplifier through a first LNA enabling state change-over switch in the first radio frequency front-end module, performing Bypass processing on the fourth target radio frequency signal to obtain a first processed radio frequency signal, and transmitting the first processed radio frequency signal to the second radio frequency front-end module through the first radio frequency front-end module;
bypassing the second low noise amplifier through a second LNA enabling state change-over switch in the second radio frequency front end module, performing Bypass processing on the first processed radio frequency signal to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
4. The 5GHz WIFI radio frequency signal processing circuit of claim 1, wherein the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is smaller than a first preset signal intensity threshold and larger than a second preset signal intensity threshold, the first low noise amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front end module, the first LNA enables the first low noise amplifier, the fourth target radio frequency signal is amplified for the first time through the first low noise amplifier, a first processing radio frequency signal is obtained, and the first processing radio frequency signal is transmitted to the second radio frequency front end module through the first radio frequency front end module;
And switching on the second low noise amplifier through a second transmitting/receiving state switching switch in the second radio frequency front end module, enabling the state switching switch to Bypass the second low noise amplifier by a second LNA, performing Bypass processing on the first processed radio frequency signal to obtain a second processed radio frequency signal, and transmitting the second processed radio frequency signal to a preset radio frequency transceiver through the second radio frequency front end module.
5. The 5GHz WIFI radio frequency signal processing circuit of claim 1, wherein the 5GHz WIFI radio frequency signal processing circuit is configured to:
If the radio frequency signal intensity of the third target radio frequency signal is smaller than or equal to a second preset signal intensity threshold value, the first low noise amplifier is conducted through a first transmitting/receiving state change-over switch in the first radio frequency front-end module, the first LNA enables the first low noise amplifier, the fourth target radio frequency signal is amplified for the first time through the first low noise amplifier, a first processing radio frequency signal is obtained, and the first processing radio frequency signal is transmitted to the second radio frequency front-end module through the first radio frequency front-end module;
And the second low-noise amplifier is conducted through a second transmitting/receiving state change-over switch in the second radio frequency front-end module, the second LNA enables the second low-noise amplifier, the first processing radio frequency signal is amplified for the second time through the second low-noise amplifier, the second processing radio frequency signal is obtained, and the second processing radio frequency signal is transmitted to a preset radio frequency transceiver through the second radio frequency front-end module.
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